diff --git a/cmake/FindOctave.cmake b/cmake/FindOctave.cmake
index 31d4337a6cb7a96f0d04156c6dba2efc8f6b1f12..b31d30576fe31fa0351ceaa6e3b4834f23b1c523 100644
--- a/cmake/FindOctave.cmake
+++ b/cmake/FindOctave.cmake
@@ -68,7 +68,7 @@ find_program(OCTAVE_CONFIG_EXECUTABLE
 
 
 if (OCTAVE_CONFIG_EXECUTABLE)
-  execute_process (COMMAND ${OCTAVE_CONFIG_EXECUTABLE} -p PREFIX
+  execute_process (COMMAND ${OCTAVE_CONFIG_EXECUTABLE} -p OCTAVE_HOME
                     OUTPUT_VARIABLE OCTAVE_ROOT_DIR
                     OUTPUT_STRIP_TRAILING_WHITESPACE)